Tobacco pipe



Dec. 17, 1935. E. H, MQARDLE 2,024,865

TBAcco PIPE Filed March 15, 1935 ATTORNEY Patented Dec. 17, 1935 UNITEDSTATES PATENT OFFICE TOBACCO PIPE Application March 15, 1933, Serial No.660,829

1 Claim. (Cl. 131 -12) My invention relates to an improved tobacco pipe.

An object of the invention is to provide a pipe construction by whichthe smoke drawn into the smokers mouth from the bowl through the bitwill be relatively cool and substantially free of moisture, condensateand other undesirable constituents of the smoke.

Another object is to so construct and correlate the bowl and bit members-that the latter may be used as a cigar or cigarette holder upon removalof the bit from its connection with the bowl.

Other objects of the invention will be apparent from the followingdescription read in connection with the accompanying drawing.

I accomplish these objects by a peculiar interior construction of thebit and shank and by the provision of a fresh air inlet leading to thesmoke passage within the pipe.

In the accompanying drawing, which is illustrative of one concrete formthe invention may take, Fig. l is a longitudinal substantial centralsection of my improved pipe, with the several parts assembled incondition for use as a pipe; Fig. 2 is a transverse section on the line2 2 of Fig, l; Fig. 3 is a longitudinal section of the bit and shankwhen assembled for use as a cigar or cigarette holder, and Fig. 4 is asimilar View of a modified form of shank.

Referring to the drawing I denotes the pipe bowl, II the shank and I2the bit. These parts are made of any suitable material; the bowl usuallybeing of briar root, meerschaum or clay, the shank of metal, hard rubberor synthetic resin, and the bit of hard rubber or synthetic resin.

The bowl I0 is desirably, although not necessarily, integral with a bowlstem I3 having a central smoke passage I4 terminating in a flare I5 atthe end remote from the bowl.

The bowl I0 and shank II are removably connected together in anypreferred manner. A desirable form of connection, as shown in Fig. `1comprises a peripheral undercut groove I6 at the outer end of stem I3engaged by the inner face of the shank end, which is of annular form.The engagement between the groove I6 and shank wall is in the nature ofa friction fit, although other well known forms of air tight connectionmight be substituted therefor, such as screw threads or taper joints.

The shank II is provided with a chamber I 'I with which the flared endI5 of the smoke passage I4 is in direct communication. The chamber II isof greater size or capacity than the passage I4 and permits of expansionand preliminary cooling of the smoke. The wall of chamber II as itapproaches the middle part of the shank II is tapered or contracted ingradual curvature to form the axial passage or orifice I8 which ispreferably annular and terminates in the opening Ia.

An air hole or duct I9 is bored through the wall of the shank and leadsfrom atmosphere to 1o a suitable point within the pipe, as for exampleto the passage I8. The hole I9, which is desirably of very small boreand serves to thoroughly mix indrawn air with smoke, extends radially ofthe shank axis, or differently expressed, extends substantially at rightangles to the longitudinal axis of passage I8.

At the end of passage i3 opposite chamber I1, the shank II is providedwith a second charnber which may be of somewhat greater 20 capacity thanthe chamber I'I. The wall of lchamber 20 embraces an undercut peripheralgroove 2I on the bit I2, thus uniting the bit and shank to each other.This connection, like the connection between the shank and bowl stem, isin the nature of a friction ft although other appropriate forms of airtight connection might be used.

Countersunk into the wall of the smoke passage 22 in the bit I2 is partof a tube 23 bent at 30 its end 23a to be out of line with the passageI8. The tube 23 hinders the passage of moisture from the shank to thesmokers mouth.

The modified construction of Fig. 4 functions in substantially the samemanner as thea form of Fig. 1. In Fig. 4, the interior passages andchambers have substantially the shape of a Venturi tube, the chambersI'Ia and 20a being tapered toward the connecting orifice |31) into whichleads the air duct IBa. ff

When the pipe is in use, smoke is drawn from the bowl through theseveral chambers and passages into the smokers mouth, the smoke flowingin a straight line through the chamber I'I although expanding therein tosome extent. As the smoke enters orifice I8 it is mixed with fresh airdrawn in through duct I9, and the ow becomes turbulent and continuesthus in chamber 20. The admixture of atmospheric air Wit-h the smoke andthe turbulent flow in orifice I8 and chamber 20 result in causingexcellent cooling of the smoke and the condensation and precipitationout of the smoke of the offensive constituents ordinarily contained intobacco smoke. The upturned end of tube 23 prevents passage 5s 2 l, n Y,e

ofV moisture into and through passage 422 and the smoke reaches thesmokers mouth in a relatively cool, dry and sweet condition.

By removal of the bowl l0 from the assembly, the shank and bit form aunit, Fig. 3, which Vserves effectively as a cigar or cigarette holderand, during smoking, offers all the advantageous effects obtained withthe device when used as a pipe. Y

Should'rcleaning be necessary, it may be readily accomplished byseparating the parts from one another and cleaning each in a manner wellknown in this art.

I claim:-

In a tobacco smoking device, the combination of a bowl and bored stem,the latter having a stricted diameter the end of said oriiiceV in the Ysecond mentioned chamber being square cornered, there being an airpassage leading from atmosphere and opening directly into said oriceintermediate its ends.

EDWARD H. MCARDLE.

